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In Nest.js, we usually apply the middleware inside the app module.

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Okay, but what happens if I pass it in on another module, for example inside the post module?

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I will copy into here and I will remove.

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Okay.

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And I will pass it inside the post module.

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I will paste and et me import.

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Now can you guess, this work or not?

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You can see like here it's applied for every route with the logger middleware.

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Now you can see, firstly if I request into the post it works right.

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If I go to the home it will not let me see, if I click okay, it also works, right?

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For that reason, with Nestjs we usually use the app module.

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With the middleware.

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Let me undo.

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Okay.

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This is it right here.

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And now you may have a question how I can apply another middleware for the another route.

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For example, the logger middleware I want is apply for every route.

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But I want it have some middleware only apply for specific route.

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In order to do that.

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Let me see, for example I will name this will be uh, let me take the name.

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Post

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Okay.

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I think post middleware.

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Okay.

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post middleware

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And how I can apply that for here.

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I can easily copy and paste this one more time And I can apply the post middleware.

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Let me change the name.

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Must we change the name of class?

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Post middleware saved us right here.

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Post middleware and I will apply it only for the post.

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Sorry, I don't have a /post.

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And if I refresh in the hello world, it already log the request for the logger middleware.

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But if I go to /posts, you can see it will log that the request is logger middleware and it's

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also run the post middleware.

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Right?

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Very cool.

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Let me remove something right here.

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Okay.

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That's it, that's for the middleware.

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Hope you understand this video.

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I will see you in the next one.